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Suppose that resistors R1 and R2 are connected in parallel to givean equivalent resistor R. If resistors R1 and R2 have tolerance of 1% each, the equivalent resistor R for resistors R1 = 300 Ω and R2 = 200 Ω will have tolerance of
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- 0.5%
- 1%
- 1.2%
- 2%
Correct Option: B
| Rreal = | = 120 Ω | |
| 200 + 300 |
Taking 1% positive error, observed value,
| Rabs = | = 121.2 Ω | |
| 202 + 303 |
| Tolerance = | = 0.01 = 1% | |
| 120 |
Taking 1% negative error, observed value,
| Rabs = | = 118.8 | |
| 198 + 297 |
| Tolerance = | = 0.01 = 1% | |
| 120 |
